From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4A4FC2BBCF for ; Wed, 16 Dec 2020 09:47:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB5A923124 for ; Wed, 16 Dec 2020 09:47:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726216AbgLPJqv (ORCPT ); Wed, 16 Dec 2020 04:46:51 -0500 Received: from smtp-fw-33001.amazon.com ([207.171.190.10]:29251 "EHLO smtp-fw-33001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726146AbgLPJqu (ORCPT ); Wed, 16 Dec 2020 04:46:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1608112010; x=1639648010; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=kg6Pid/S3uyECtsR9/ZQNoRBSFk6tXHhc71xqlOp1H8=; b=kS9th3P7ImUHvUuqq8xssvdUPYc4hCv00xtY9kaSZbI8ah8C05P287E7 HNNJxWfmdchnlpaoJMFR8J96vDoTpSLQwWzUpwtxWvvl4sxIJ/IWdiMkR 1Mni1fT+Zygpf+eROmv3sxs5tOqybHqMAviRCTHVrfFlfIgDoLEieuYSb U=; X-IronPort-AV: E=Sophos;i="5.78,424,1599523200"; d="scan'208";a="103495486" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2a-22cc717f.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-33001.sea14.amazon.com with ESMTP; 16 Dec 2020 09:46:09 +0000 Received: from EX13D31EUA001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-2a-22cc717f.us-west-2.amazon.com (Postfix) with ESMTPS id 62653A1BCB; Wed, 16 Dec 2020 09:46:05 +0000 (UTC) Received: from u3f2cd687b01c55.ant.amazon.com (10.43.161.31) by EX13D31EUA001.ant.amazon.com (10.43.165.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 16 Dec 2020 09:45:48 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC v10 09/13] tools/damon/record: Support physical memory monitoring Date: Wed, 16 Dec 2020 10:42:17 +0100 Message-ID: <20201216094221.11898-10-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201216094221.11898-1-sjpark@amazon.com> References: <20201216094221.11898-1-sjpark@amazon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.43.161.31] X-ClientProxiedBy: EX13D16UWB001.ant.amazon.com (10.43.161.17) To EX13D31EUA001.ant.amazon.com (10.43.165.15) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: SeongJae Park This commit allows users to record the data accesses on physical memory address space by passing 'paddr' as target to 'damo-record'. If the init regions are given, the regions will be monitored. Else, it will monitor biggest conitguous 'System RAM' region in '/proc/iomem' and monitor the region. Signed-off-by: SeongJae Park --- tools/damon/_damon.py | 2 ++ tools/damon/record.py | 29 ++++++++++++++++++++++++++++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/tools/damon/_damon.py b/tools/damon/_damon.py index a22ec3777c16..6ff278117e84 100644 --- a/tools/damon/_damon.py +++ b/tools/damon/_damon.py @@ -27,6 +27,8 @@ def set_target(tid, init_regions=[]): if not os.path.exists(debugfs_init_regions): return 0 + if tid == 'paddr': + tid = 42 string = ' '.join(['%s %d %d' % (tid, r[0], r[1]) for r in init_regions]) return subprocess.call('echo "%s" > %s' % (string, debugfs_init_regions), shell=True, executable='/bin/bash') diff --git a/tools/damon/record.py b/tools/damon/record.py index 11fd54001472..6fd0b59c73e0 100644 --- a/tools/damon/record.py +++ b/tools/damon/record.py @@ -101,6 +101,29 @@ def set_argparser(parser): parser.add_argument('-o', '--out', metavar='', type=str, default='damon.data', help='output file path') +def default_paddr_region(): + "Largest System RAM region becomes the default" + ret = [] + with open('/proc/iomem', 'r') as f: + # example of the line: '100000000-42b201fff : System RAM' + for line in f: + fields = line.split(':') + if len(fields) != 2: + continue + name = fields[1].strip() + if name != 'System RAM': + continue + addrs = fields[0].split('-') + if len(addrs) != 2: + continue + start = int(addrs[0], 16) + end = int(addrs[1], 16) + + sz_region = end - start + if not ret or sz_region > (ret[1] - ret[0]): + ret = [start, end] + return ret + def main(args=None): global orig_attrs if not args: @@ -122,7 +145,11 @@ def main(args=None): target = args.target target_fields = target.split() - if not subprocess.call('which %s &> /dev/null' % target_fields[0], + if target == 'paddr': # physical memory address space + if not init_regions: + init_regions = [default_paddr_region()] + do_record(target, False, init_regions, new_attrs, orig_attrs, pidfd) + elif not subprocess.call('which %s &> /dev/null' % target_fields[0], shell=True, executable='/bin/bash'): do_record(target, True, init_regions, new_attrs, orig_attrs, pidfd) else: -- 2.17.1